Lots of times things look suspicious in the early organ scan but later on are not even seen at all. Certainly do the echo and if it is small, it will most likely not cause any problems at all and will close by itself by age 18. Even a moderate VSD will probably not cause problems at birth. However, you should consult a pediatric cardiologist and ask him what he thinks, although he may be biased in general about homebirth. You might first ask if there seems to be any risk at birth, and should you expect any problems with the baby and would he need any special care or observation. Then you can tell him you are planning a homebirth. I would have a pediatrician check the baby soon after birth and not wait the usual "up to 24 hours" if there is a small VSD. Another possible option is to have a homebirth and then go to hospital after a few hours.